351344421 has 12 divisors (see below), whose sum is σ = 523868800. Its totient is φ = 226673640.

The previous prime is 351344417. The next prime is 351344437. The reversal of 351344421 is 124443153.

It is a happy number.

It is not a de Polignac number, because 351344421 - 2² = 351344417 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (351344821) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 629371 + ... + 629928.

Almost surely, 2^351344421 is an apocalyptic number.

351344421 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

351344421 is a deficient number, since it is larger than the sum of its proper divisors (172524379).

351344421 is a wasteful number, since it uses less digits than its factorization.

351344421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1259336 (or 1259333 counting only the distinct ones).

The product of its digits is 5760, while the sum is 27.

The square root of 351344421 is about 18744.1836578710. The cubic root of 351344421 is about 705.6310571136.

Adding to 351344421 its reverse (124443153), we get a palindrome (475787574).

The spelling of 351344421 in words is "three hundred fifty-one million, three hundred forty-four thousand, four hundred twenty-one".